Emergency lock knob for bathroom doors



l' Feb. 13, 1940.

vS. RIOSSMAN EMERGENCY LOCK KNOB FORv BATHROOM DOORS Filed March 16, 1939 2 Sheets-Sheet 1 INVENTOR Sol@ Rossmann.

ATTO R N EY Feb. 13, 1940. s. RossMAN 2,190,485

EMERGENCY LOCK KNOB FR BATHROOM DOORS Filed March 16, 1939 2 Sheets-Sheet 2 l0 30. za l 27 y INVENTOR Sol/l Ron/nan.

Patented Fel.v 13, 1940 y o 2,1%? .f

UNITED [STATES PATENT oFFicE EMERGENCY LOCK KNOB FOR BATHROOM I DOORS p y `SollyRossman, Brooklyn, N. Y.

ApplcationjMarch 16, 1939, Serial No. 262,129 6 claims. (o1. 292-92) This invention relates to new and useful imthe outside of the door. This shield is arranged provements in an emergency lock knob for bathin a manner so as to make the handlev slightlyinroom doors. accessible to prevent accidental unlocking of the The yinvention has for'an object the yconstrue-- door from the outside.

5 tion of a lock which is capable of being operated The particular lock illustrated on the drawings 'f5 y from the inside of the door, and in emergency, to vis of the type which engages into the door from be opened from the outside of the door. one edgel thereof. This lock has a door jamb More specifically, the invention contemplates plate l5 through which the bolt il is extendib'le. the 'provision of a shield mounted on the outside This plate I6 is held upon the door by several '10 0f the door and engaging OVBI' a Control rhandle screws ll. The plate l5 also connects With the 10 by which the lock may be opened, andarransed body la of the lock. Thebort li is sidably l in a manner to render the control handle slightly mounted Within the body i3. Normally, the A inacessible to prevent accidental unlocking of body I8 is closedby a plate i9 which is held in the door from the outside. position with-Ka screw ZGadapted to lthreadedly '1.5 .The invention isparticularly intendedl to open engage an opening 2l formed in the boss 2.52 15.

doors which are locked bychildren who thereformed upon the body I8. after become panicky 'and do not know how to A member 23 is rotatively supported through reopen them. The linvention is also useful in'v the body I3 and is provided with a nger 23 encases where a person who locks himself in the gaging a cutout 24 formed in one side ofthe bolt .20 .bathroom or other place, thereafter becomes ill Il and by whichl the bolt may be moved inwards 20 or'haszsome otherr accident which prevents him and'outwards. 'This member 23 has a tail porfrom reopening the door. tion 23h engaged by a leaf spring 25 suitablyvsupyFor further comprehension of the invention, y ported by lugs 25. lThis leaf spring isyadapted and of the objects and advantages thereof, referto hold the member Z3 in one position in which y2.5 ence'will be had to the following description and the bolt El is retracted, or in a second position 251 accompanying drawings, and to the appended which the bolt is extended. This construction is y claims in which the various novel features of the conventional.

invention are more particularly set forth. The handle l2 is rotatively supportedjon a door In the accompanying drawings forming a maplate 25 which is secured upon the inner face of y :39 terial partof this disclosurethe door Ill by several screws 2l. The handle I2 30 Fig. l is an edge elevational View of a door is provided with a stem 2S upon its 'inner end, equipped with an emergency lock according to `which is of square shape in transverse cross secthis invention. y y v tion and which engages into a square'socketv .ig` 2 is an elevational view looking in the opening formed in the member 23; ,The arl5 direction of the line 2`2 of Fig. 1. rangement is such `that thev handle l2 ymay be .35

Fig. 3 is a fragmentary perspective View lookrotated through substantially 90 for closing or ing in the `direction of the line 3-3 of Fig. l. opening the bolt Il.' Fig, 4 is a fragmentary sectional view taken on v The stern' 28 extends completely through the the line 44-4 of Fig. 2. body i8 of ,the lock and projects from the outer v.

v19' 5 is a side elevational view of av portion face thereof. The ,stem` i3 isformed with 4a ,40

of the lock illustrated with a front plate thereof socket portion 13a which engages the outer end removed. i of the stem 23. The handle Hl is mounted upon Fig. Sis va perspective view of the front plate the extended end of the stem i3. The shield l5 which has been removed from the lock shown has a face wall l52L which extends over the stern 4.5 in Fig. 5. y le and the handle a4 when the boit u, is ex-v 45 The vemergency lock for bathroom doors or tended. The shield l5 also has side walls l5b other places is used vin rcombination with a door extending towards the outer face of the door. A llLIThis door is equipped with a lock mounted plate 3l! is secured upon the outer face of. the 'thereon and having an operative bolt Il operadoor by several screws .The shield l l5 is ,59 tive from the inner side of the door by a control mounted upon this plate 3d. One side wall` of 50.

' handle l2. A stein i3 is Connected with the lock the shield l5 is formed with an opening I5c l for opening the bolt il from the outer side of the through which the handle I4 is extended when door. This stem is provided with a handle M the bolt l5 is retracted.

which is normally dispo-sed, when the lock is The door lock is provided with a latch bolt 33 locked Within a shield l5 which is mounted on slidably mounted within the body lll and having 55 a bevelled extended end 33a. A spring 34 urges this latch bolt 33 into an extended position. A turnable member 35 is mounted through the body I8 and is provided with fingers 36 engaging within a slot 31 formed in the inner end of the bolt 33 by which the bolt 33 may be retracted. Another nger 3S is pivotally supported at the point 39 and has one end 38a engaged by a leafA spring 45 supported upon lugs 4I and 42 formed on the body I8. This spring 40 tends to normally urge the rotative member 35 into a position in which the bolt 33 is extended. 'Ihis member 35 is formed with a square opening through which a bar 43 engages. This bar 43 extends completely through the door. Knobs 44 are mounted upon the ends ofthe bar. The arrangement is such that the knobs 44 may be turned to retract the latch bolt This is conventional construction in locks.

'I'he shield I5 is movably mounted upon the plate 34 to be moved to a position further spaced lfrom the plate to give space toene attempting to move the handle I4 to open the lock. A means is provided for normally latching the shield I5 against motion.

More specifically, the shield I5 at three of its corners, is provided with lugs 45. Bolts 46 pass through these lugs and are xedly mounted on the plate 3D. Expansion springs 4l are coaxially mounted on the bolts 46 and act between the heads oi the bolts and the lugs 45 for normally vurging, the shield I5 into intimate contact with the plate 3U.

A bolt 48 is fixedly mounted upon a boss 49 formed upon the inside of the shield I5. This bolt 48 extends through'an opening 5I) formed in the plate 30 so that its head is disposed immediately adjacent the inner face of the plate 3i). A catch plate 5I is slidably supported upon the inner face of the plate 3i! by reason of eni .46 gaging between tracks 52 mounted on the plate 3!) and directed towards each other. 'I'he catch plate 5I is formed with abayonet opening 53 arranged to engage over the head of the bolt 43. When the small end of the bayonet opening engages the head 48 the shield I5 is locked and cannotY be moved. However, when the catch plate 5I is moved to a position in which the large end of the bayonet slot 53 engages over the head 48, the shield is free. A link 54 pivotally connects with the catch plate 5I and pivotally connects witha lever 55 :fixed upon the rod 43. This lever 55 is disposed within a hollow of the plate 35,

The operation of the device is as follows:

When the door I!! is closed the bolt II may be extended and retracted from the inner side of thedoor by operating the handle I2. In the retracted position of the bolt II the handle I4 will be extended from the shield I5 asillustrated in Fig. 2. In the extended position of the bolt II the handle I4 will be in the position indicated by the dot and dash lines in Fig. 2. In this latter position it is disposed within the shield I5. The opening I5c in the side wall of the shield is so small that the handle I4 is not readily accessible. However, the handle may be shed out through the opening IEC by the use of a hair pin or other suitable implement.

The handle I4 may also be iished out with the little 'nger provided that the shield I5 is first moved away from the plate 35. 'Io do this it is required that one of the knobs 44 be turned to a position in which the latch bolt 33 is retracted. In this position the rod 43 will be in a turned position in which the lever 55 is in a position substantially aligned with the link 54 so that the catch plate 5I is lowered. In the lowered position of the catch plate the large end of the bayonet opening 53 will be over the head of they bolt 43. While the person holds the knob 44 with one hand, he may with the other hand grip the shield I5 and pull it outwards. The springs 41 will compress while this is being done. Then the person may release the knob and use his little finger to reach the handle I4 and move the handle downwards to open the bolt II.

When the shield I5 is released the springs 46 will urge it against the plate 3G. Theknob 44 must be turned to move the catch plate 5| downright is reserved to all changes and modifications coming within the scope of the inventionv as denned in the appended claims;

Having thus described my invention, what claim as new, and desire to secure byUnited States Letters Patent is:

l. In a lock, a lock body for engagement on' a;

door, a bolt slidably mounted in said bodygfand operative from the inner side of said door,a.ste'rn- Connected with said boit for` operating said boit.

and extending to the outer side of said door,.a handle on said stem, anda shield mountedfon the outer side of'said door and engaging over' said stem and handle making same inaccessible when said door is locked to prevent accidental unlocking oi the door from the outside, said shield i comprising a hollow shell having a face wall. spaced from the door and sidewalls, 'one of said side walls having an opening through which said handle may be engaged.

2. In a lock, a lock body for engagement on a door, a bolt slidably mounted in said body and operative from the inner side of said door, ak stern connected with said. bolt for operating saidbolt and extending to the outer side of said door,-a

handle on said stem, and a shield mountedfonv. li r the outer side of said door and engaging over said stem and handle making same inaccessible iba when said door is locked to prevent 'accidentalj unlocking of `the door from the outside, and -said v shield being movably mounted to be: movable to a position to make said handle accessible, resilient means urging said shield back to its original position.

3. In a lock, a lock body for engagement on av n door, a bolt slidably mounted in said body and operative from the inner side of said door, a

stem connected with said bolt for operating ,saidy bolt and extending to the outer side of said door, a handle on said stem, and a shield mounted lon the outer side of said door and engaging over said stem and handle making same inaccessible when said door is locked to prevent accidental unlocking of the door from the outside, and said v shield being movably mounted to bev movable to a position to make said handle accessible, resilient means urging said shield back to its `original position, and means for1latchingsaid shieldin its original position.

4. In a lock, a lock body for engagement on a .i door, a bolt slidably mounted in said'body -and operative from the inner side of said door.- a

stem connected withv said bolt for operating said ssi.

bolt and extendingto the outersde of said door, a handle on'said stem, and a shield mounted on theouterside of said door and engagingover said steinv and handle making same 1inaccessible when said 4door is vlocked Ato prevent accidental unlocking of the door from the outside,`and said shield being movably mounted to be movable to a position to make said handle accessible, re

silient means urging said shield back to its original position, and means for latching said 'shield in its original position, said means being operable from arotative lhandle to release the shield.

5. In a lock, a lock body for engagement on a door, 4a bolt slidably` mounted in said body and operative from the inner side of said door, a

dle accessible, and means for locking said shield in its initial position comprising avturnable knob, a lever movable vby said knob, a link pivotally connected with said lever, a large catch plate pivotally connected with the link and movable thereby and having a key-hole shaped opening, and a bolt mounted on said shield and having a head cooperative with saidopening for latching or releasing the shield. i

, 6. In a lock,la lock body for engagement on a door, a bolt slidably mounted in said'body and operative from the inner side of saidv door, a stem connectedwith saidbolt for operatingsaid bolt rand extending to the outer side of said door, a handle on said stem, a shield mounted on the outer side of said door and engaging over said stem and handle making same inaccessible when said door is" locked to prevent accidental unlocking ofthe door from theoutside, and said shield being movably mounted to make saidhandle accessible, and means for locking said shield in its initial position comprising a turnable knob,

leasing the shield, said catch plate 4being slidablyv supported.

' SOLLY ROSSMAN. 

